Who invented the graphical user interface (gui)?

The option enables you to modify a slide element in most presentation applications.

Which steps will open the system so that you can enter a question and do a search for

  to change the number of rows and columns displayed by the excel object a. select the object and drag a size handle on the active object. b. deselect the object and drag a size handle of the object. c. deselect the object and drag a row or column divider of the object. d. select the object and drag a row or column divider on the active object.